Peter quarelli



(No Model.)

P. QUARELLI. MONKEY WRENCH.

Patented Feb. 1', 1898.

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PATENT PETER QUARELLI, OF OHIOAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO' EMILIO LONGI-II, OF SAME PLACE.

MONKEY-WRENCH.

SPECIFICATION forming part of Letters Patent No. 598,487, dated February 1, 1898 Application filed Deeembe1'4,189'7. Serial No. 660,776. 7 (No model.)

To all whom it may concern:

Be it known that I, PETER QUARELLI, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Monkey-Wrenches, which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part thereof, and in which- Figure 1 shows my said invention in side elevation and the manner in which it is held and operated. Fig. 2 shows upper part of said device in perspective. Fig. 3 shows a rear View of the entire device. Fig. 4 shows the sliding or movable jaw in side elevation.

Like letters of reference denote like parts.

The object of my invention is to provide a monkeywrench wherewith a nut may be firmly grasped, whereby the slipping of the jaws of the wrench over the corners of the nut may be prevented and thereby its original well-finished shape preserved intact indefinitely from injury through such a source, and in addition to said desirable features there is the advantageous point inherent in the nature of the device that when force is applied to turn a nut the grasp of the jaws of the wrench thereon becomes greater in proportion to such applied force. To attain said desirable ends, I construct my said new device in substantially the following manner, namely:

I make a stem at, preferably hollow, as here shown, with slots in front and rear and provided with a fixed jaw O. Said hollow stem receives the rack-toothed shank b, provided with a jaw O and having at its front edge a rack I), reached through the front slot a of the stem at bya pinion h on a shaft f, carried in a lug i, forming a bearing on one side of the slot a for said shaft. On the outer end of said shaft f is a ratchet-wheel g, engaged by a pawl-head 71, forming a part of the thumblever Z, pivoted at j on a hand-lever m,which latter is pivoted on the shaft f betweenthe lug carrying the shaft f and the ratchet-wheel g. A spur 61 extends from the stem 79 through the rear slot a, and said stem stands on an end spring 0 in a hole in the stem a under the lower end of the stem 5. Near the lower end of the handle a, is an oval opening q to form a convenient handle by allowing the two outer fingers of the hand to pass through it, and the lower end of the lever Z has a curved thumb-piece Z, against which the thumb presses to overcome the pressure of a spring is on a studio, held on the lever m. Ahinged loop n engages in a notch n in the lower end of the lever m to hold it in its closed position and at the same time in a fixed position when the jaws are closed on a nut 00. A screw-driver 19 forms the end of the handle a. In use the jaws are brought against the sides of a nut by holding the lower jaw C firmly against the nut and bringing the upper jaw 0 down upon the nut by the pressure of the forefinger upon the spur d and at the same time pressing the thumb against the end Z of the lever 2 so as to at the same time throw the lever or back from'the opening or ring g on its pivotal shaft f, as shown in Fig. 1. When all the parts are so placed, the thumb releases the lever Z and its pawl-head 2'. After the lever m is swung out from the handle the teeth of the pawl '11 are allowed to engage with the ratchet-wheel g, after which the lever 'm is pressed toward the handle a. Said motion of the lever m turns the wheels g h and thus causes the head 0 to be pressed upon the nut 00 with great force. When under such conditions the two levers or handles a m are locked together by means of the locking-ring n, the wrench will be held firmly on the nut whenreleased from the hand. Said latter advantage may be still further increased by so constructing the shaft f as to obtain a torsional yield to such applied force.

What I claim is- V '1. The combination with a hollow stem with fixed jaw, a shaft-lug and a shaft therein with a pinion at one end and a ratchet-wheel at the other end thereof, of a jaw-headed racktoothed spurred and spring-lifted shank, a

pawl engaging said ratchet-wheel and a lever actuating said pawl, ratchet-wheel and rack, substantially as specified.

' 2. .The combination with a j aw-headed stem with one or more longitudinal slots, a rackpinion and a ratchet-wheel on one shaft and means to hold said shaft, of a jaw-headed,

rack-*toothed, spurred, and spring-lifted for said wheels, and means to hold said shaft,

of a jaw-headed, rack-toothed, spurred and spring-lifted shank, a swinging lever fulcrumed on said pinion-shaft, a pawl to engage said ratchet-wheel, pivoted on said swinging lever, spring mechanism to engage, and hand mechanism to release, said pawl and ratchetwheel, and means to lock said swinging lever to its closed position, substantially as specified.

PETER QUARELLI.

Witnesses:

EMILIO LONGHI, AUG. F. WENDT. 

